﻿; (function ($) { // secure $ jQuery alias
    /*******************************************************************************************/
    // jquery.event.hover.js - rev 5 
    // Copyright (c) 2008, Three Dub Media (http://threedubmedia.com)
    // Liscensed under the MIT License (MIT-LICENSE.txt)
    // http://www.opensource.org/licenses/mit-license.php
    // Created: 2008-06-02 | Updated: 2008-07-30
    /*******************************************************************************************/

    //	USE THESE PROPERTIES TO CUSTOMIZE SETTINGS...

    //	$.event.special.hover.delay = 100; 
    //	Defines the delay (msec) while mouse is inside the element before checking the speed

    //	$.event.special.hover.speed = 100; 
    //	Defines the maximum speed (px/sec) the mouse may be moving to trigger the hover event

    // save the old jquery "hover" method
    $.fn._hover = $.fn.hover;

    // jquery method 
    $.fn.hover = function (fn1, fn2, fn3) {
        if (fn3) this.bind('hoverstart', fn1); // 3 args
        if (fn2) this.bind('hoverend', fn3 ? fn3 : fn2); // 2+ args
        return !fn1 ? this.trigger('hover') // 0 args 
		: this.bind('hover', fn3 ? fn2 : fn1); // 1+ args
    };

    // special event configuration
    var hover = $.event.special.hover = {
        delay: 100, // milliseconds
        speed: 100, // pixels per second
        setup: function (data) {
            data = $.extend({ speed: hover.speed, delay: hover.delay, hovered: 0 }, data || {});
            $.event.add(this, "mouseenter mouseleave", hoverHandler, data);
        },
        teardown: function () {
            $.event.remove(this, "mouseenter mouseleave", hoverHandler);
        }
    };

    // shared event handler
    function hoverHandler(event) {
        var data = event.data || event;
        switch (event.type) {
            case 'mouseenter': // mouseover
                data.dist2 = 0; // init mouse distance²
                data.event = event; // store the event
                event.type = "hoverstart"; // hijack event
                if ($.event.handle.call(this, event) !== false) { // handle "hoverstart"
                    data.elem = this; // ref to the current element
                    $.event.add(this, "mousemove", hoverHandler, data); // track the mouse
                    data.timer = setTimeout(compare, data.delay); // start async compare
                }
                break;
            case 'mousemove': // track the event, mouse distance² = x² + y²
                data.dist2 += Math.pow(event.pageX - data.event.pageX, 2)
				+ Math.pow(event.pageY - data.event.pageY, 2);
                data.event = event; // store current event
                break;
            case 'mouseleave': // mouseout
                clearTimeout(data.timer); // uncompare
                if (data.hovered) {
                    event.type = "hoverend"; // hijack event
                    $.event.handle.call(this, event); // handle "hoverend"
                    data.hovered--; // reset flag
                }
                else $.event.remove(data.elem, "mousemove", hoverHandler); // untrack
                break;
            default: // timeout compare // distance² = x² + y²  = ( speed * time )²
                if (data.dist2 <= Math.pow(data.speed * (data.delay / 1e3), 2)) { // speed acceptable
                    $.event.remove(data.elem, "mousemove", hoverHandler); // untrack
                    data.event.type = "hover"; // hijack event
                    if ($.event.handle.call(data.elem, data.event) !== false) // handle "hover"
                        data.hovered++; // flag for "hoverend"
                }
                else data.timer = setTimeout(compare, data.delay); // async recurse
                data.dist2 = 0; // reset distance² for next compare
                break;
        }
        function compare() { hoverHandler(data); }; // timeout/recursive function
    };

    /*******************************************************************************************/
})(jQuery); // confine scope